If you have a router and other computers connect to it. Then you can.
You will have to plug the external drive into one of your computers. once you have done this and the drive is showing you need to share the contents of the drive with the other computers. You will need to look up network shearing, and how to set up a Home group to share the files of the Hard drive with other computers over the said network.
Please follow this link to setup a home group and network share of the files of the Hard drive to other computers. http://windows.microsoft.com/en-GB/windows7/products/features/homegroup